sigma

西格玛、希腊字母Σ

The symbol on the board is a lowercase sigma, not an s.

黑板上那个符号是小写的西格玛，不是英文字母s。

标准差统计

Anything beyond three sigma is treated as an outlier here.

在这里，超过三个标准差的数值都被视为离群值。

求和符号数学

The big sigma tells you to add up every term in the series.

那个大写求和符号表示要把数列中每一项都加起来。

独行侠、特立独行者俚语

He calls himself a sigma and eats lunch alone every day.

他自称是独行侠，每天都自己一个人吃午餐。

酷、帅气、厉害俚语

Walking out without saying a word was such a sigma move.

一句话都不说就走出去，这举动实在有够帅。